 There's nothing about masturbation in these 1600 plus pages and yet kids are swatted for exploring their body. First off teaching kids to masturbate is perverted and disgusting. Second, the Bible says this, flee from sexual immorality every other sin a person commits is outside the body but the sexually immoral person sins against their own body. Masturbation is a form of sexual immorality. Sexual fulfillment is only acceptable in the context of marriage. In this context we're called to think of the needs of our spouse first which is in stark contrast to the selfish sexual fulfillment in masturbation. Though we all have a tendency towards sinful desires God said that when we put our faith in him he will make us into a new creation. That doesn't mean that all our temptations are going to go away but it does mean that he has provided us with his power and his presence to overcome the temptations that we do experience.